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LetteraPatent No. 77,232, dated April 28, 1868.

MODE 0? PRODUCING SURFACES FOR PRINTING FROM PHOTOGRAPHS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, WALTER BENTLEY Woonnunr, of London, in the county of Middlcsex,Kingdomof Great Britain and Ireland, have invented anew and useful Mode of Producing Surfaces fbr'Irinting from Photographs; and I do hereby declare the following to be a full, clear, and exact description of the same. v

My invention relates to improvements on the photo-relz'evo printing process, which forms the subjeetmatter of previous Letters Patent granted to me, and bearing date at Washington, the 20th day-of February, in the year of our Lord one thousand eight hundred and sixty-six, No. 52,803; and'consists, firstly, of a new and useful method of improving or adding pictorial eflects to the gelatine reliefs;" and secondly, to a new and improved method of obtaining the ..metal moulds" or intaglios from the gelatine reliefs.

In carrying out the first part of my invention I proceed as follows:

The original gelatine relief is obtained, in the manner described in the specification of my former patent,

above alluded to, the'solution of gelatine beingmixed with a certain amount of coloring-matter, so that when viewing it by transmitted light, the full pictorial effect is perfectly visible.

Before removing the said relief from the glass, I take "a solution of hot g'elatine of the same consistency and containing the same amount of coloring-matter as the original mould, and I paint therewith upon the latter any additional shade or pictorial effect that may he dcsired, (keeping the glass warm during-the process,) and Wheuthis additional coating has become dry it will form a relief exactly corresponding with the other parts of the gelatine mould which were produped by the agency of light. The class of effects most suitable for this process are the introduction of clouds, figures, stronger shadows, Ste.

I then take a metal reverse or intaglio from this relief, and print therefrom (as describcd'in the specification of my former patent) in semi-transparent ink.

It will be evident that the gelatine reliefs for this purpose may (if preferred) be made entirely by hand, the

artist merely painting on the glass with the semi-transparent gelatine ink, until the required pictorial eifectis seen by transmitted light.

The second part of my invention, which relates to the method of obtaining the metal in'tagl io from the gelatine relief, consists principally in producing such intaglios by pressure, instead of by the electrotype process, as previously practised by me.

In carrying out this part of my invention, I take a gelatine relief, (after it has been, perfectly dried, by artificial heat or otherwise,) and place it in contact with a sheet offspft metal or alloy, between two perfectly even surfaces of steel, and submit it to pressure in a hydraulic or other press. By this means the surface of the soft metal or alloy becomes impressed withthe exact counterpart or reverse ofthe gelatine relief, and the metal reverse thus obtained forms the intaglio or mould wherewith to print with the semi-transparent ink.

What I claim as my invention, and desire to secure by Letters Patent, is

1- The method hereinbefore described of improving or adding pictorial efiects to the gelatine reliefs by painting thereon by hand with a colored solution of gelatine.

2. I claim producing such gelaitine reliefs entirely by hand, as hereinbefore described; and

3. I claim producing the metallic intaglio from the gelatine reliefs by pressure, substantially ashcrein before described.

In testimony whereof, I have signed my name to thisspecification in the presence of two subscribing witnesses.

WALTER B. WOODBURY.

Witnesses Gnonen DAVIES, F. G. Mrextawmen'r. 

